Structural member.



J. KAHN. STRUCTURAL MEMBER. APPLICATION FILED P3116, 1911,

' Qluumtnr Patented July 23, 1912.

UNIT D STATES PATENT oFFioE.

JULIUS KAHN, OF DETROIT, MICHIGAN, ASSIGNOR TO TRUSSED CONCRETE STEEL COMPANY, OF DETROIT, MICHTGAN, A CORPORATION OF' MICHIGAN.

STRUCTURAL MEMBER.

Application filed February 6, 1911. Serial No. 606,677.

Specification of Letters Patent.

To all whom it may concern:

- Be it known that I, JULIUS KAHN, acitizen of the Unit-ed States, and a resident of Detroit, in the county of Wayne and State of Michigan, have invented a new and Improved Structural Member, of which the following is a specification.

This invention relates to structural material of metal, especially to beams adapted to support concrete floors, and its object is to provide structural members formed of a plurality of parts which are united without the necessity of drillingand riveting, which structural members may be proportioned to the load to be carried.

Figure 1 is an end elevation of a built-up beam and a side elevation of a joist supported thereby, together with a joist hanger. Fig.

2 is a perspective view of a joist hanger. Fig. 3 is a view of a supportingstirrup. Fig. 4 is a section on the line 1010 of Fig. 2. Fig. 5 is a horizontal section of one end of the joist.

Similar reference charactersrefer to like parts throughout the several views.

The drawing illustrates a beam 28 of any desired design, but preferably formed with an upper flange 29. The beam may have a foot 30 connected to which is a tension member 31. The joist carried by the beam 28 is shown to consist of a plate26 having flanges 27 along its lower edge, which flanges are preferably formed by securing angle bars to the plate by means of rivets. The hanger to connect the end of the joist-to the beam comprisesa plate 32 having the substantially semi-cylindrical receptacles or halfsleeves 33 pressed out of. the same. The upper end of the stirrup is bent laterally to form the bearing plate 34:, and then downward to formthe hook35. To this hook may be secured the angle bar 36toengage joists. When the structure shown in this drawing is used .in connection with reinforced concrete floors, the-upper edges of the joists will be embedded in the concrete which will resist the compression stresses. Flanges are therefore unnecessary along the upper edges of the joists.

Many of the details and proportions of this construct-ion may be changed by engineers without departing from the spirit of my invention.

Having now explained my construction, wh t I claim as my invention and desire to sec re by Letters Patent is Y 1. The combination with a beam and a joist having flanges atits lower'edge, a joist hanger comprising a plate bent to form a horizontal portion, a vertical lip at one edge of the same and a vertical plate hav-, ing half-sleeves pressed out of thesame, at the other edge, means secured to thelip .to engage the flanges of the beam, and stir-- rups comprising U shaped rods, one arm of each extending down into a half-sleeve and the other arm extending down along the end of the joist, the lower end thereof extending through a hole in a flange of the joist.

2. The combination of a beam, a joist having flanges at its lower edge, a joist hanger comprising a vertical plate having semi-cylindrical portions pressed ontward and having its upper end bent around the upper portion of the beam, and a plurality of bent rods, one portion of each extending into the semi-cylindrical portions of the hanger, and the other portion extendingdown along the joist.

In testimony whereof I have signed this specification in the presence of two subscrib ing witnesses. 1

JuLIUs KAHN.

\ /Witnesses MINNIE K. KENNEDY, EDWARD N. PAGELSEN. 

